unitTestRun

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description carries the full burden of behavioral disclosure. 'Runs unit tests' provides no information about whether this is a read-only or destructive operation, what permissions might be required, whether it's synchronous or asynchronous, what happens to test results, or any rate limits or side effects. For a tool that presumably executes code, this lack of behavioral information is a significant gap that could lead to misuse.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is extremely concise at just two words. While this represents under-specification rather than ideal conciseness, according to the calibration examples, extremely brief descriptions that don't waste words receive high conciseness scores. Every word in 'Runs unit tests' contributes to the core purpose statement, with zero wasted verbiage.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given that this is a tool that presumably executes code (with potential side effects), has no annotations, no output schema, and operates in a complex development/testing environment with many sibling tools, the description is woefully incomplete. 'Runs unit tests' provides insufficient context about what the tool actually does, how it behaves, what it returns, or how it relates to other testing tools. For a potentially impactful execution tool, this level of description is inadequate.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema has 100% description coverage, with both parameters ('url' and 'flags') clearly documented in the schema itself. The description adds no additional parameter information beyond what's already in the schema. According to the scoring rules, when schema_description_coverage is high (>80%), the baseline score is 3 even with no parameter information in the description, which applies here.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description 'Runs unit tests' is a tautology that essentially restates the tool name 'unitTestRun'. It provides no specific information about what kind of unit tests are run, what system or framework is involved, or what resources are affected. While it does include a verb ('Runs') and resource ('unit tests'), it lacks any distinguishing details that would help differentiate it from sibling tools like 'unitTestEvaluation' or 'runClass'.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides absolutely no guidance on when to use this tool versus alternatives. There is no mention of prerequisites, appropriate contexts, or comparisons to sibling tools such as 'unitTestEvaluation' or 'runClass'. The agent receives no help in determining when this specific unit test execution tool should be selected over other testing or execution tools available on the server.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.